private void buttonAddToList_Click(object sender, EventArgs e) { Client client = new Client(); if (ClientValidation.isValidID(textboxClientId) && ClientValidation.isValidName(texbBoxClientName) && ClientValidation.isValidValues(textboxStreet) && ClientValidation.isValidValues(textboxCity) && ClientValidation.isValidValues(textboxPostalCode) && ClientValidation.isValidValues(textboxFaxNumber) && ClientValidation.isValidValues(textboxCreditLimit)) { client.ClientID = Convert.ToInt32(textboxClientId.Text); client.Name = texbBoxClientName.Text; client.Street = textboxStreet.Text; client.City = textboxCity.Text; client.PostalCode = textboxPostalCode.Text; client.PhoneNumber = maskedtextboxPhoneNumber.Text; client.FaxNumber = textboxFaxNumber.Text; client.CreditLimit = Convert.ToInt32(textboxCreditLimit.Text); ClientDA.Add(client); ClearAll(); } }